When the movie opened, aspiring country singer Brad Paisley went to see it in the hopes that an ex-girlfriend he'd seen the first "Father of the Bride" remake with would be there. She didn't show, but as he told an Atlanta radio station later, he sat in the theater watching the lead actress and thought to himself, "I could marry a girl like her." A few years later, he not only married a girl like her, he married that particular girl - actress Kimberly Williams-Paisley.
When Diane Keaton was given the script for the movie, she nearly refused to film when she found out she had to pretend to be pregnant as she was nearly 50. It took a bag of humbugs and a lot of pleading from Steve Martin and Nancy Meyers to get her to join.
The set used for the interior of the Banks' home had to be rebuilt from scratch for the sequel. With no presumption of a sequel during production of the original movie, the set was destroyed after production completed. Set crew had to recreate the entirety of the set based only on a few remnant sketches of the original set, and had to infer most measurements based on the known sizes of various reference items in the original film.
The line, "I have a brilliant-beyond-brilliant idea," uttered by George Banks regarding the sale of their house, is also spoken in The Parent Trap (1998) by Hallie, the American twin, regarding the girls' identity switch. Both movies were written in part by Nancy Meyers.
When, George asked for his secretary to help him find famous celebrities who are older than him she mentions former president Bill Clinton being 31 days older than George, when in real life Steve Martin is actually 1 year and 5 days older than Bill Clinton.
In the theatrical trailer, a scene which is not included in the DVD is shown with Franck telling George and Brian that there will be "sterks" (storks) at the baby shower. During the Scrabble scene, you can see "sterks" on the board, along with the other pregnancy-related words.